// 是否微信端
export function isWechat() {
  let u = navigator.userAgent
  let wechat = u.indexOf('MicroMessenger') > -1
  return wechat
}

// 一般个人信息start
// 是否中文名字
export function judgeChinese(str) {
  let reg = /^[\u4e00-\u9fa5]{2,11}$/
  return reg.test(str)
}
// 是否包含汉字
export function isHasChinese(str) {
  let reg = /.*[\u4e00-\u9fa5]+.*$/
  return reg.test(str)
}
// 是否邮箱
export function isEmail(str) {
  let reg = /^(\w)+(\.\w+)*@(\w)+((\.\w{2,3}){1,3})$/
  return reg.test(str)
}
// 是否是QQ号
export function isQQ(str) {
  let reg = /^[1-9]([0-9]{5,11})$/
  return reg.test(str)
}
// 是否为手机号
export function isPhone(str) {
  const reg = /^[1][3,4,5,7,8][0-9]{9}$/
  return reg.test(str)
}
// 手机号隐藏中间四位数
export function hidePhone(str) {
  return str.replace(/(\d{3})\d{4}(\d{4})/, '$1****$2')
}
// 是否身份证号码
export function isIdCard(str) {
  const vcity = {
    11: "北京", 12: "天津", 13: "河北", 14: "山西", 15: "内蒙古",
    21: "辽宁", 22: "吉林", 23: "黑龙江", 31: "上海", 32: "江苏",
    33: "浙江", 34: "安徽", 35: "福建", 36: "江西", 37: "山东", 41: "河南",
    42: "湖北", 43: "湖南", 44: "广东", 45: "广西", 46: "海南", 50: "重庆",
    51: "四川", 52: "贵州", 53: "云南", 54: "西藏", 61: "陕西", 62: "甘肃",
    63: "青海", 64: "宁夏", 65: "新疆", 71: "台湾", 81: "香港", 82: "澳门", 91: "国外"
  }

  function checkCard(card) {
    //是否为空
    if (card === '') {
      return false
    }
    //校验长度，类型
    if (isCardNo(card) === false) {
      return false
    }
    //检查省份
    if (checkProvince(card) === false) {
      return false
    }
    //校验生日
    if (checkBirthday(card) === false) {
      return false
    }
    //检验位的检测
    if (checkParity(card) === false) {
      return false
    }
    return true
  }

  //检查号码是否符合规范，包括长度，类型
  function isCardNo(card) {
    //身份证号码为15位或者18位，15位时全为数字，18位前17位为数字，最后一位是校验位，可能为数字或字符X
    const reg = /(^\d{15}$)|(^\d{17}(\d|X)$)/
    // const reg=/^[1-9]\d{5}(19|20)\d{2}[01]\d[0123]\d\d{3}[xX\d]$/
    if (reg.test(card) === false) {
      return false
    }

    return true
  }

  //取身份证前两位,校验省份
  function checkProvince(card) {
    let province = card.substr(0, 2)
    if (vcity[province] == undefined) {
      return false
    }
    return true
  }

  //检查生日是否正确
  function checkBirthday(card) {
    let len = card.length
    //身份证15位时，次序为省（3位）市（3位）年（2位）月（2位）日（2位）校验位（3位），皆为数字
    if (len == '15') {
      let re_fifteen = /^(\d{6})(\d{2})(\d{2})(\d{2})(\d{3})$/
      let arr_data = card.match(re_fifteen)
      let year = arr_data[2]
      let month = arr_data[3]
      let day = arr_data[4]
      let birthday = new Date('19' + year + '/' + month + '/' + day)
      return verifyBirthday('19' + year, month, day, birthday)
    }
    //身份证18位时，次序为省（3位）市（3位）年（4位）月（2位）日（2位）校验位（4位），校验位末尾可能为X
    if (len == '18') {
      let re_eighteen = /^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/
      let arr_data = card.match(re_eighteen)
      let year = arr_data[2]
      let month = arr_data[3]
      let day = arr_data[4]
      let birthday = new Date(year + '/' + month + '/' + day)
      return verifyBirthday(year, month, day, birthday)
    }
    return false
  }

  //校验日期
  function verifyBirthday(year, month, day, birthday) {
    let now = new Date()
    let now_year = now.getFullYear()
    //年月日是否合理
    if (birthday.getFullYear() == year && (birthday.getMonth() + 1) == month && birthday.getDate() == day) {
      //判断年份的范围（3岁到100岁之间)
      let time = now_year - year
      if (time >= 3 && time <= 100) {
        return true
      }
      return false
    }
    return false
  }

  //校验位的检测
  function checkParity(card) {
    //15位转18位
    card = changeFivteenToEighteen(card)
    let len = card.length
    if (len == '18') {
      let arrInt = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2)
      let arrCh = new Array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2')
      let cardTemp = 0
      let i
      let valnum

      for (i = 0; i < 17; i++) {
        cardTemp += card.substr(i, 1) * arrInt[i]
      }
      valnum = arrCh[cardTemp % 11]
      if (valnum == card.substr(17, 1)) {
        return true
      }
      return false
    }
    return false
  }

  //15位转18位身份证号
  function changeFivteenToEighteen(card) {
    if (card.length == '15') {
      let arrInt = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2)
      let arrCh = new Array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2')
      let cardTemp = 0
      let i
      card = card.substr(0, 6) + '19' + card.substr(6, card.length - 6)
      for (i = 0; i < 17; i++) {
        cardTemp += card.substr(i, 1) * arrInt[i]
      }
      card += arrCh[cardTemp % 11]
      return card
    }
    return card
  }

  return checkCard(str)
}
//是否有空格
export function checkSpaceCharacter(val) {
  let reg = /\s/
  if (reg.exec(val) == null) {
    return true
  } else {
    return false
  }
}
// 是否为空
export function isEmpty(str) {
  if (str === '') {
    return false
  }
  return true
}
//一般个人信息end

// 数字相关start
// 是否6位数字验证码
export function isSixNumberCode(str) {
  let reg = /^[0-9]{6}$/
  return reg.test(str)
}
// 是否正整数
export function isZhengNumber(str) {
  let reg = /^[1-9]\d*$/
  return reg.test(str)
}
// 是否只有数字和字母
export function isOnlyNumberLetter(str) {
  let reg = /^[0-9a-zA-Z]+$/
  return reg.test(str)
}

// 判断是否满足保留几位小数
export function isNumberDecimal(num, n) {
  let isOk = true
  let str = num + ''
  let index = str.indexOf('.') + 1
  let sum = str.length - index

  if (sum > n) {
    isOk = false
  }
  return isOk
}

// 判断是否数字
export function isNumber(num) {
  let isOK = true
  let reg = /^[0-9]+.?[0-9]*/
  if (!reg.test(num)) {
    isOK = false
  }
  return isOK
}

export function isPrice(num) {
  let reg = /(^[1-9](\d+)?(\.\d{1,2})?$)|(^[1-9]$)|(^\d\.[1-9]{1,2}$)|(^\d\.[0]{1}[1-9]{1}$|(^\d\.[1-9]{1}[0]{1}$)$)/;
  if (reg.test(num)) {
    return true;
  } else {
    return false;
  }
}
// 数字相关end


// 字母相关start
// 判断是否是小写字母
export function isLowerCase(str) {
  const reg = /^[a-z]+$/
  return reg.test(str)
}

// 判断是否是大写字母
export function isUpperCase(str) {
  const reg = /^[A-Z]+$/
  return reg.test(str)
}

// 判断是否是字母
export function validAlphabets(str) {
  const reg = /^[A-Za-z]+$/
  return reg.test(str)
}
// 字母相关end
